HAO Colloquium - Convection and emerging active regions

Speaker: Hannah Schunker, The University of Newcastle (Australia)

How sunspots and active regions emerge is a crucial, but poorly understood aspect of the solar dynamo.  The emergence of magnetic field from the interior of the Sun converts the toroidal magnetic field into poloidal magnetic field.  Only since the advent of the SDO/HMI monitoring campaign has it been possible to capture the emergence process of hundreds of active regions in observations of the magnetic field, Doppler velocity and intensity continuum. By measuring the average motion of the polarities, surface velocities and pattern of convection, it is clear that convection plays an important role in the emergence of magnetic field on the Sun. We are starting to be able to distinguish active region classes of active regions based on the sign of the diverging flows before emergence.


Date and time: 
Wednesday, December 1, 2021 - 3:00pm to 4:00pm